Digital x-ray detectors

An x-ray detector, comprising:

• a detector subsystem configured to output electrical signals in response to reception of x-rays, the detector subsystem comprising:
• an imaging panel comprising a two-dimensional flat panel substrate;
• a low density core disposed over a support layer and bonded to the two-dimensional flat panel substrate such that the low density core is sandwiched between the two-dimensional flat panel substrate and the support layer.

An x-ray detector, comprising:

• a detector subsystem configured to output electrical signals in response to reception of x-rays, the detector subsystem comprising an integrated imaging panel and panel support having a two-dimensional flat panel substrate bonded to a low density core disposed over a support layer such that the low density core is sandwiched between the two-dimensional flat panel substrate and the support layer.